Storing sensitive data like passwords and confidential information on your Android device unprotected is risky to say the least. Fortunately, the Secret Space Encryptor (SSE) app can take good care of your precious data.

You may have already tried PGP/GPG public key encryption for documents or mail, but do you know what’s going on under the hood and what level of security you’re actually getting? We take an in-depth look at GnuPG encryption.

Practical cryptography is often an encounter with many random numbers in just a few moments. Entropy is the raw material that gives birth to the random number, but it’s harder to come by than you might think.

Conventional, woodpecker-style port knocking is open to sniffing and brute force knocking attacks. Sending an encrypted packet with an access request to the server is safer and more modern. Learn more about Firewall Knock Operator, a.k.a. Fwknop.